APA
Ahlstrom R. V., . (1991). Evaluationg three ring interpretations at walpi pueblo, Arizona. Washington-US: Society for American Archaeology.
Chicago
Ahlstrom Richard V, . 1991. Evaluationg three ring interpretations at walpi pueblo, Arizona. Washington-US: Society for American Archaeology.
Harvard
Ahlstrom R. V., . (1991). Evaluationg three ring interpretations at walpi pueblo, Arizona. Washington-US: Society for American Archaeology.
MLA
Ahlstrom Richard V, . Evaluationg three ring interpretations at walpi pueblo, Arizona. Washington-US: Society for American Archaeology. 1991.